Earth Sculpture; Or, The Origin of Land-forms |
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Page 7
... sedimentary fossiliferous formations . R FIG . I. SECTION OF HORIZONTAL STRATA . The upper continuous line , A - B , = surface of ground ; the lower continuous line , C - D , level ; 7 , limestone ; s , sandstones and shales . = sea ...
... sedimentary fossiliferous formations . R FIG . I. SECTION OF HORIZONTAL STRATA . The upper continuous line , A - B , = surface of ground ; the lower continuous line , C - D , level ; 7 , limestone ; s , sandstones and shales . = sea ...
Page 8
... sediment arranged in gently in- clined or approximately horizontal layers . Now , over considerable areas of the ... sedimentary strata alike . Here , for example ( Fig . 1 ) , is a section across a country , the superficial rock ...
... sediment arranged in gently in- clined or approximately horizontal layers . Now , over considerable areas of the ... sedimentary strata alike . Here , for example ( Fig . 1 ) , is a section across a country , the superficial rock ...
Page 12
... sedimentary strata have been submerged at one and the same time . the contrary , the several geological systems have been accumulated at widely different periods . This is a point , however , to which we shall return : for the present ...
... sedimentary strata have been submerged at one and the same time . the contrary , the several geological systems have been accumulated at widely different periods . This is a point , however , to which we shall return : for the present ...
Page 14
... sedimentary deposits could have been piled up in the shape of great pyramids : obviously the beds . were formerly continuous , as shown by the dotted lines . Clearly some " monstrous cantles " have been cut out and removed . And the ...
... sedimentary deposits could have been piled up in the shape of great pyramids : obviously the beds . were formerly continuous , as shown by the dotted lines . Clearly some " monstrous cantles " have been cut out and removed . And the ...
Page 18
... SEDIMENTATION GO HAND IN HAND . THE present , geologists tell us , contains the key to the past . If we wish to find out how rocks have been removed , and what has since become of them , we must observe what is taking place under the ...
... SEDIMENTATION GO HAND IN HAND . THE present , geologists tell us , contains the key to the past . If we wish to find out how rocks have been removed , and what has since become of them , we must observe what is taking place under the ...
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Common terms and phrases
accumulation Alps anticlines basalt base-level basins become beds Carboniferous character cliffs coast-lines cones configuration Cretaceous crust crustal movements crystalline débris denudation deposits depressions depth detritus direction dislocations drainage elevation epigene action epigene agents eroded escarpments eventually feet fiords flexures flow fluvio-glacial deposits folds fracture gently geological structure glacial action glaciers gradually granite ground-moraines Highlands hills hollows horizontal strata ice-sheet igneous rocks inclined indented infrequently irregular islands joints Jura Mountains laccoliths lakes land land-forms land-surface lava less limestone low grounds masses materials Mesozoic modified moraines mountain-chain mountain-valleys mountains normal faults North Old Red Sandstone outcrops owe their origin Permian plain of erosion plateau regions relatively result ridges rock-basins rock-masses sand sandstones schistose schists Section sediment shales Silurian slopes Southern Uplands strata streams and rivers superficial surface surface-features synclinal tectonic tend thickness tion tracts traversed underground undulating usually valleys vertical volcanic